S7 Cheap Chinese Cases

I have an official LED Samsung case for my S7. It worked great, and then the LEDs stopped working. Apparently a common thing.

I recently bought a cheap Chinese clear front case, that you can download Kview apps to work with. The problem is, all of them turn off the fingerprint reader, which is how I unlock my phone.
Is there one that doesnt?
If not, is there a way just to write a simple prog that can wake the phone up, when the case is opened (happy with the always on display as it is)?